fix(rollout): skip process cleanup for Oracle

[zhiheng-yang]

fix(rollout): skip process cleanup for Oracle

Summary

Oracle mode awaits solve.sh directly and does not start an ACP or session agent. Rollout.disconnect() nevertheless treated the fallback launch label oracle as a process name and derived this cleanup command:

pkill -f '(^|[ /])oracle( |$)'

There is no persistent Oracle process for that pattern to clean up. On a runtime that shares the runner's PID namespace, it can instead match BenchFlow's own --agent oracle command and terminate the run after verification but before the final result is built.

This change skips pattern-based cleanup only when the current launch value is exactly oracle. Other agents, including similarly named launches such as oracle-agent-acp, keep the existing cleanup behavior. The check uses the current _agent_launch, so role changes through connect_as() remain aligned with the process that was actually launched.

Testing

• Added regression coverage for oracle, opencode, and the oracle-agent-acp near-match; the regression fails on main and passes with this change.
• Ran the relevant rollout and lifecycle tests: 286 passed. Ruff, changed-file formatting, and ty check also pass.
• Completed an end-to-end SkillsBench Oracle run on Daytona as a non-regression check: 1/1 passed, mean reward 1.00, errors=0, with the final summary and artifacts written successfully.

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[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no bugs or issues to report.